Refrigerating apparatus.



E. P. CONNELLY.

REFRIGERATING APPARATUS. APPLICATION FILED IAN. 23. I915.

Patented Feb. 22, i916.

2 SHEETS-SHEET l.

EfP. CONNELLY.

REFRIGERAUNG APPARATUS.

APPLICATION FILED JAN. 23, i915.

1,172,873. lufented-eb.22,196.

2 SHEETS-SHEET 2.

i 'mi 2H Q w; QW( iq) iinrnieaiiiiriive Arrennrirs.

ifivaevs,

I Specification of Letters l-"ateiit Application filed lainiiiii'yl 23, 1915. Serial No. 3,839.

To all eli/tom. et muy concern i Be it known that I, EUGENE l). CONNELLY, a citizen of thelllnited States, and a resident of Boston, in the county oit Sullclk and Stat'eof4 Massachusetts, have invented certain new and useful lmprovcnients in Refrigerating Apparatus; and l do hereby declare thefolloiving to be a full, clear, and exact description of the invention', such as will enable others skilled in the art to which it appertains to malte and use the same.

This invention-relates to an improvement in i'efrigerating apparatus, one object being to provide improved means `for automatically maintaining the liquefied gas under pressure and feeding same through an eX- pension valve into the freezing or refrigeratiiig coil.

'A further Objectis to provide improved means for withdrawing the gas at intervals from the refrigei'ating coils. and for forcing` it into the storage cylinder, and also for replenishing the air supply by which the pressure on the liquefied gas within the pressure cylinder is maintained. Q

With these and other endsl iii vieiv my in vention consists in the parts and combinan tion of parts and in the details o' construction as Will loe more fully explained and pointed out inv the claims.

The accompanying drawings, Figure l is a diagrammatic view in elevation, partly in section of my apparatus, and Fig. 2 is a similar viev7 of a modified form. l

1 represents an aircompressor, 2 a gas -compressor and 3 a Water pump, located side by side, with their pistons connected oy rods to the crank shaft 4 which carries a Vgear -5 in mesh with tlie smaller gear 6 on shaft '7, the latter carrying a hand crank 8 for iotat ing shaft ll. lt is evident however that the same results could be accomplished 'by leest# ing themjin other positions, and actuating them by any approved forni of motors and gearing?,

ll'ieadinpl troni the' gas compressor 2 is the pipe 9, which is' connected to one end of av condenser' coil 9, which is cooled by avvater spray from a spraying pipe l0 connected with pump 3, and which liquciies tlieammonia gas, and leading troin the otherend 'ci said condenser coil 9, is `the pipe Ill which discharges the liquid into .the top ci the water cooled storage cylinder lf2, a valve ll with anexpansion valve.

being located in pipe l1 between coil 5) and cylinder l2 to preventtlie flow of liquid from the cylinder back to the condenser coil.

le is a pipe communicating with cylinder l2 near the top thereof and provided at l5l This pipe is connected with one end or' the freezing or rei'igerating coil 16, While the opposite en'd of the latter is connectcdlby pipe 17 to receiver 18, the pipe 17 being provided with releasing valve 19 of any approved form .for maintaining a uniform pressure in the coil pressure'within the coils 36. This valve 19 can bey so adjusted "to maintain a uniform pressure ivitliin the coil, .by permitting any' receiver 18 is of size sufficient to takecare of all the gas used during a reasonable period of time. llVitli the relief valve set to yrelease at that pressure in coils 16 which 'will give the best cooling elect, a uniform pressureaiid temperature Will he maintained in Patentes ret. se, reist 16, and preventing the accumulation of back tlie coils. As the excess pressure in coilsl escapes intotlie receiver, the pressure in the latter will rise, endif the receiver he of Sullicierit size to accommodate, all the gas stored 4 in cylinder l2, it is apparent that tlie"pressure in .the receiver would never equal tlie pressure in the coils. It is not however iiec`- essa'ry or desirable to use a receiver to accominodate all the gas, but one et size sutli cient tc maintain the proper temperature for a reasonable length ottime. As the excess ofpressure is released, the pressure in the receiver 'Will continue to .increase until it equals that in the coilsu Up to this period a uniform temperature and pressure will be maintained iii ,the coils, but as the liquefied gas still continues to lie discharged from cyl ii'ider 12,'itis apparent that the pressure in the coils yand also the receiver will continue i to rise but owing to the incieasinfg'pressure a uniform temperature wouldnot be meintaiiied.- The ohiect or" the receiver is 4to maintain a uniform pressure ,and temperature for a longer period. tlianvvould nichel Wise be possible.

Leading compressor 2 istlie .pipe Pl). provided with the stop valve 2l, which regulates 'the iioiv .from thel receiver 18 to the gas Mlm of gas from the receiver to the gos com.- pressor. :md the gas colnpressor L is provided :it its lower end with n si'iring; controlled vulve which opens npwnrcliy so that ns the piston rises it draws in the gus through pipe 20. The cylinder is :ilse providei'l :1t its betteln with :i spring; actur -ated vulve E23 which opens downwerdiy :ind

permitting the compressed-'gas to poss into4 the coilQ. i

Lending from the bottom ot :ur compresson 1,' to the nir reservoir 24, 1s the pipe Q5 provided with u 'revive 2G for preventing the .ton Nh the l huck'llow otl oir, and communicating ,with the reservoir Qi, through pipe 2T, is the coinpression cylinder Q8. The compression cylincler is locuted in the pinne of thestornge cylinder l2, und carries n` piston 29, which is connected to piston in the storage cyl,- inder `lil hy the piston rod 3l. Piston is oi 'grenier dizuneter thzinpiston 30, sind they uvre rigidly connected by the rod 31 the piston 30 uccessnrilmiT follows the more -nient ot' the piston 21). Cylinder 28 is provided ut its upper end with n vent pipe Pipe 27, which connects the reservoir with the f :oinpzession cylinder 2S is prorider'l 'with e reducing; telve 33.

In the opcrntion ofthe apparatus :nniuouin ras is forced by the compressor 2 into roiulensr-r coil 9 Where it is liqueed :1nd pusses from thence, in liquid form, into storage cylindre EQ. `drifter the cylinder lit hns heen filled with the iiqneiied et high pressure, the is stijl :further compressed hr :ulmitltiiur eoinpressed nir to the under side of piston The pressure :igninst pis ton QS) is ulivuh soliioient to maintain the liiziuid in evlii'ider 12 under compression and prevent any eiipnnsion'ol? the hitter also 'prevents passoire of ammonia impor to the retrigesting eiil. After the proper pres sure or the liquefied gros in 'the eyvliiiidcr lf3 hns hein nttuined, the exijiension valve lo opened thus permitting the iquidin the cylinder gradually escape: into the irotin-ffh soil, Where it voiporined and j unsion produces n low teni ue in the coils inthe Well ltnown mnu-- The iiquiifl escapes slowly from the cylhul; es 'the prossimo on pieton El? rees oit the on ph nachhilfe :termed op- E thus honiiugr the liqneied gres, irrei i .i ot the iluentitmif there-ot in the :al

nel miler lh ulwujvs in L11/eers to supply ges to the coil for :i certain length of time,\vl1ich of course can be increased or decreased by varying the size of the cyl- `inder, or by adjusting valve 15. Aiter the :ipperntns has exhausted itself, or in other Words, ntter. ell the liquid in cylinder 12 has passed into the refrigernting coil 16, the nir is exhausted from cylinder 28 and the conr pressors l and 2 and pomp 3 started. The. operation of the compressor 2 sucks or withdraws the gas from the receiver 18 through pipe 20 into the, compressor 2 und from thence 'forces it through condenser 9 und into the storage cylinder 1'2 in liquid form under pressure, While the nir 4compressor l restores the nir pressure in reservoir 24:. Instead of using :in nir pump or compressor l, nir could he supplied to n reservoir A from :inf accumulator which would oper-nte to maintain the nir in' seid reservoir :it :in even pressure from the commencement to the end i of the operation, and instead of using nir et all for ,maintaining the liquid in compres sion tank: 12 under compression Writer under hydrent or other pressure may he used 1n compression cylinder A Instead of ceriving the refrigeraiting coils into the retrigere tor or other cooling :ipertinent, Where the leakage ot ammonio, gifs would spoil the toed, may use the reirigeraizinp; coil lo tu fool brine which is cir cnleted in: the refrig erster. tiuch construction is shown in 2 wherein I have shown the refrigeiuf 'ng coil 16 located withv in the hrine tenir .3153 for cooling the brine therein; Trink 33- is provided with e pipe 314:, hnving n valve 35 therein, through which the brine passes to the cooling or refrigerating coil 16 located. within the refrigerator or other eonilmrtnientT zi'rd with n pipe BG, through which the hrine returns from coii 1G tothe brine tuoi; udjnceiit the top thereof, fr pump 3i' heilig connected with the rcturn pipe 36 for Mi'ioroingr circulation. With this construction, fis in the previous one, the of lmch yu'essure ol. gais in pipe 17 escapes into the receiver 21S :1nd posses Jfrom thence hach: to the compressor.

This device inny he used for commercial or dementie use, end its construction is Such that the compressor or pumps l and 2 nre used only inV re-lirfuefying the end puttingg,` it Under pressure in cylinder 1Q :rnd for replenis ing; the nir reservoir it is evident tliut u'mnjf slight changes ininjht he resorted to in the relative nrrnngo ment oi parte shown :ind described Without deuurtinrg 'From the spirit :ind scope of my invention. i-Ienm i would. have it understood that I do 4not wish to confine myself to the exact construction and arrangement of parts shown and described, butl Having fully described my invention what I Yclaim as new and desire to secure by Letters-Patent, is 'I 1. In a rerigerating apparatus, the combination of a gas compressor, a condenser, a storage cylinder into which the liqueied gas is forced by the gas compressor, a refrigerating coil connected with the top of said storage cylinder and with the gas compressor, an expansion valve intermediate the storage cylinder and the refrigerating coil, a piston at the bottom of said storage cylinder and means for actuating said piston whereby ,the liquefied gas in said cylinder is mainy tained under constant pressure and the passage of ammonia vapor to refiigerating coil prevented.

2. In refrigerating apparatus, the combination of a gas compressor, a storage cylinder, a condenser intermediate the compressor and cylinder and communicating. with both, a refrigerating coil connected at one end with the top of said storage cylinder and at the other end with the compressor, an expansion valve intermediate the storage cylinder and' refrigerating coil, a piston at the bottom of the storage cylinder, a pistonv rod connected with said piston` and carrying a larger piston at its other end, a cylinder for 'said larger piston, and means for supplying a pressure fluid to said last-mentioned cylinder whereby the fluid in the storage cylinder is maintained under constant pressure, and the passage of ammonia'va'por from said storage cylinder to the refrigerating coil prevented.

nation with a gas compressor, aV storage cylinder, condenser intermediate said c'ompresser and cylinder and communicating with both, a refrigerating coil connected at one endwith the top of the storage cylinder and at its other 'end with the compressor and an expansion valve intermediate the storage,V

3. In refrigerating apparatus, the' combi-v 'cylinder and refri erating coil, atl a'piston at the bottom of t e storage cylinder-,il rod connected with said piston, a larger piston on the other end of said rod, an air cylinder in which said larger cylinder works, an air l reservoir in communication with said air cylinder, an air compressor and a pipe lead-l.A

ing from said air compressor to the air reservoir.

4. In refrigerating apparatus, the combination of a gasfvcompressor, a condenser, a. storage cylinder into which the liquefied gas is forced by the gas compressor, a refriger ating coil connected with. the top of said storage cylinder and with a receiver, a relief valve in the pipe leading to the receiver, a

pipe connecting the receiver and the gas compressor, an expansion valve intermediate the storage cylinder and the coil, a piston at the bottom of said storage cylinder and coil connected with the top of saidstorage .cylinder and with. the gas compressor and,

passing through a brine tank, an expansion valve intermediate the storage cylinder and the refrigerating coil, a piston at the bottom of said storage cylinder, means for actuating' said piston whereby the liquefied gas in sain .cylinder is maintained under constant pressure, and'a coil communicating' with sait? brineta'nk. y

In .testimony whereof, I have signed this ing witnesses.

EUGENE P. CQlfIlIElIiLY.v Witnesses: i

y A. W; Barona; S. C Inim.;

Specification in the presence of twosubsebf sal 

